Not that many really.

Since the mobile apps and desktop app share a lot of code, you could if you wanted profile the desktop app in similar scenarios to guesstimate usage patterns. As long as you remember that the desktop app will also load more data (bigger screen, so more data to handle), it should be fine.

Somehow, you could compare it to a browser usage pattern. There's some index, some various files that are cached... My guess in your case is bad quality SD card or bad SD drivers / reader.